The fashionistas have spoken - sexy sheer clothing is the hot trend for Spring/Summer 2013.

That's right, what lingerie lovers have been sporting for years has finally made it into the mainstream fashion world, with couture designers like Moschino and Alberta Ferretti featuring sexy sheer pieces in their latest shows.

It's not difficult to see why sheer clothing has such an appeal. There's something so overtly erotic about a sheer-through dress that it's become a bedroom staple.

But the trend has finally extended to the catwalk and high street. That begs the question - would you ever wear sheer clothing in public?

Has the secret to sexual happiness been unlocked - and is it all in our heads?

A new study has shown that when it comes to sex, we're happy when we we're keeping up with the Joneses and even happier if we think we're having MORE SEX than our peers.

Tim Wadsworth, associate professor of sociology at the University of Colorado Boulder says, "Having more sex makes us happy, but thinking that we are having more sex than other people makes us even happier."

The results of Wadsworth's study of how sexual frequency corresponds with happiness noted:

Respondents who reported having sex at least two to three times a month were 33 percent more likely to report a higher level of happiness than those who reported having no sex during the previous 12 months.

Those reporting a once-weekly frequency were 44 percent more likely to report a higher level of happiness.

Those reporting having sex two to three times a week are 55 percent more likely to report a higher level of happiness.

If members of a peer group are having sex two to three times a month but believe their peers are on a once-weekly schedule, their probability of reporting a higher level of happiness falls by about 14 percent

So while matching our peers (and bettering them) makes us feel happier, it would appear to be a dicey game. The fact we're social creatures and engage in social comparison often leaves us feeling lacking. As Wadsworth says, “We’re usually not looking down and therefore thinking of ourselves as better off, but we’re usually looking up and therefore feeling insufficient and inadequate.”

What do you think? Is it quality over quantity? Do you feel happier if you think you're having a better sex life than your friends? Are you one of the rare few who don't let comparisons with other people influence your happiness?

Between Receptionist's Day and National Garlic Day (which is coming up on April 19th, by the way), it seems like Hallmark has a different card for every obscure holiday.

One we can definitely get on board with, however, is Cake and Cunnilingus Day, which falls annually on April 14th.

Coming from the from the Neo-Latin words cunnus (meaning vulva) and lingua (meaning tongue), cunnilingus refers to oral sex performed on a woman - so get ready to be treated by your partner next weekend, ladies!

To celebrate Cake and Cunnilingus Day, we're giving away a Sqweel 2 Oral Sex Simulator (£39.99) to one lucky reader. Simply comment below before April 12th to be in with a chance to win.

This luxurious lingerie set is available from sizes 8 - 18 and frames your, or your partner's, breasts perfectly for optimal cleavage. How do you nab this fantastic prize? Simply comment below to be in with a chance to win.

Read on below for the breast best cleavage-related news from around the web.